as in to freeze
to become physically firm or solid
wait for the modeling clay to firm up before handling the finished pot
Synonyms & Similar Words
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Example Sentences
Recent Examples of Synonyms for firm (up)
Verb
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Resistance to the idea is, in part, fueled by the fact salaries for lawmakers have been frozen since 2009.—
Mychael Schnell,
The Hill,
30 July 2025 -
Father and English teacher Frank Strong, a co-founder of the Texas Freedom to Read Project, told the committee that similar restrictions at the Carroll school district caused one high school library to freeze book purchases for two years.—
Bayliss Wagner,
Austin American Statesman,
30 July 2025
Verb
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That those brilliant turquoise waves had flattened and hardened into muted whites and grays.—
Laura Poppick
July 22,
Literary Hub,
22 July 2025
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Bottom line Gel polishes are painted on, similar to regular nail polish, and require UV or LED light to harden.—
Rebecca Dancer,
Allure,
18 July 2025
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“Firm (up).” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/firm%20%28up%29. Accessed 5 Aug. 2025.
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